Cylinder head, method for manufacturing same, and engine

A cylinder head and an overhead camshaft engine using the cylinder head. The cylinder head has a top surface (1), an inlet side surface (2), an exhaust side surface (3), a front end surface (4), and a rear end surface (5), a camshaft mounting base (6) and a rocker arm support mounting boss (7) being distributed on the top surface, and a through return passage (8) being provided between the front end surface and the rear end surface. The cylinder head has a first fuel straight channel (10) vertically extending downwards from the rocker arm support mounting boss and a second fuel straight channel (11) horizontally extending from the inlet side surface, the first fuel straight channel communicating with the second fuel straight channel and the second fuel straight channel communicating with the return passage. An L-shaped pipe (200) or an arc pipe (300) can be used to replace the first fuel straight channel and the second fuel straight channel. The cylinder head can make the structure of the engine more compact, thereby further implementing miniaturization.